Welcome Josh. Nice to see a youngster interested in the hobby. What kind of scrolling do you like to do?
I mostly do pictures/portraits so my answers below are related to that type of scrolling.
Like others are saying, there are many methods and most have their preferences. I no longer use clear packing tape over my patterns, but if it is a very delicate pattern I do use blue painters tape. If not I put the pattern directly on the wood. I feel the painters tape helps hold the delicate stuff together, coarse you have to be very careful when removing it. I use 3M 77 spray adhesive but there are others that probably work just as well.
I have not tried double sided tape. I would be concerned about the sawdust getting to it and the pattern lifting up. I would also worry about removing it from the wood once the cutting was complete, because any double sided tape I have had, really sticks. Those are my concerns, but does not mean it wouldn't work, like I wrote, I have not tried it. One other thing is it is expensive.....